C minor chord
C minor keeps the root and fifth of C major but lowers E to E-flat.
The keyboard
Build C minor yourself on the virtual keyboard: select exactly the notes C – E♭ – G. If your selection is correct, the page confirms the chord. Use “Reset” to start over and “Show solution” to see the reference again.
Structure
Chord symbol: Cm · Notes: C – E♭ – G
C minor consists of C, E-flat and G. C to E-flat is a minor third, and E-flat to G is a major third. This reversed order of thirds compared with C major creates a minor triad.